Revert "board-olympus-modem adapted to new modem-ctrl-agent, reboot notifier added to finally remove MDM_SHUTDOWN error". Drains too much battery

This reverts commit 44f28332bd0b51c7c2d97d8ddd2d599d54575d8f.
Revert "no longer needed (most probably) mdm_ctrl.c commented out". Needed by previous version of driver

This reverts commit 7683e63330345aa7f0060a40a0e87859fa8186be.
back to old modem driver + reboot notifier to fix MDM_SHUTDOWN notification